CN103629279A - Gap adjusting mechanism for air pressure disc brake - Google Patents
Gap adjusting mechanism for air pressure disc brake Download PDFInfo
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- CN103629279A CN103629279A CN201310686191.7A CN201310686191A CN103629279A CN 103629279 A CN103629279 A CN 103629279A CN 201310686191 A CN201310686191 A CN 201310686191A CN 103629279 A CN103629279 A CN 103629279A
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- flange
- ring
- needle bearing
- step shaft
- overload clutch
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- 230000006870 function Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
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- Mechanical Operated Clutches (AREA)
Abstract
The invention discloses a gap adjusting mechanism for an air pressure disc brake. The gap adjusting mechanism comprises a shifting fork, a flange, balls, an overload clutch, an adjusting shaft and a fixed disc, wherein the flange is provided with a step shaft and a flange disc; an inner hole of the shifting fork is matched with an outer ring of a unidirectional needle bearing; an inner ring of the unidirectional needle bearing is mounted on the step shaft of the flange; a plurality of first concave pits are formed in the lower end face of the flange disc of the flange; a plurality of second concave pits corresponding to the first concave pits are formed in the upper end face of a shell of the overload clutch; the balls are contained in containing cavities formed among the first concave pits and the corresponding second concave pits; spline grooves are formed in an inner wall of the shell of the overload clutch; spline teeth are formed in the periphery of a fixed wheel; the spline teeth are matched with the spline grooves; a tensioning spring is arranged between the fixed disc and the shifting fork; the flange is provided with a retainer ring; the retainer ring is baffled at one end of the unidirectional needle bearing and one end of the step shaft; a wear-resisting sheet is arranged between a lug boss of the adjusting shaft and the fixed disc. The gap adjusting mechanism for the air pressure disc brake is simple in structure and reliable in performance.
Description
Technical field
The present invention relates to a kind of disk type braker of pneumatic control, especially relate to a kind of gap adjusting mechanism.
Background technique
The disk type braker of pneumatic control is applied in urban public traffic vehicles, medium-to-high grade sightseeing bus, heavily loaded goods carrying vehicle now more and more.
The type disk type braker is comprised of unsteady caliper, bracket, brake slipper, brake disc.The caliper that wherein floats consists of brake lever, hold down gag, Returnning spring, gap adjusting mechanism.The major function of gap adjusting mechanism is the wearing and tearing of compensation brake slipper in braking process, guarantee that the air gap between brake slipper and brake disc is constant, at disk type braker, be on active service the stage, air gap value should not depend on the state of wear of brake slipper and polishing machine and keep constant.
Because the gap adjusting mechanism of pneumatic control disk type braker can only make gap excessive between brake slipper and brake disc reduce, and can not increase the gap between brake slipper and brake disc, so clearance adjustment mechanism should possess unidirectional regulatory function.And in order to eliminate excessive braking force, gap adjusting mechanism must have torque overload protective function, overload protection function is normally realized by overload clutch.The unidirectional adjustment function of gap adjusting mechanism of prior art mainly realizes by helical torsional spring, this structure has proposed very high requirement to the performance of helical torsional spring, and domestic material and technique are difficult to bonding to stability and the reliability of adjusting function.The overload protection function of the gap adjusting mechanism of prior art is realized by multiplate clutch sheet, and this complicated structure is high to material requirements, and then has increased cost.
Summary of the invention
The object of the present invention is to provide a kind of gap adjusting mechanism of air-pressure disc brake of simple in structure, reliable performance.
In order to achieve the above object, technological scheme of the present invention is: a kind of gap adjusting mechanism of air-pressure disc brake, comprise shift fork, flange, ball, overload clutch, adjusting axle and fixed tray, described fixed tray and flange are rotatably assorted and are sleeved on adjusting axle, described shift fork is enclosed within outside flange, described overload clutch is positioned at the bottom of adjusting axle, described overload clutch comprises housing, spring and fast pulley, one end and the inner walls of spring offset, the other end and fast pulley offset, fast pulley is fixed on the bottom of adjusting axle, the periphery of described housing is provided with external splines, described flange has Step Shaft and flange plate, Step Shaft is upper, flange plate under, the endoporus of described shift fork coordinates with the outer ring of a unidirectional needle bearing, the inner ring of unidirectional needle bearing is arranged on the Step Shaft of flange, the lower end surface of the flange plate of described flange has several the first pits, the upper-end surface of the housing of described overload clutch has several second pits corresponding with the first pit of flange, described ball is contained in the cavity volume forming between the first pit and corresponding the second pit, the inwall of the housing of described overload clutch has spline, the periphery of fast pulley has spline tooth, spline tooth coordinates with spline, between described fixed tray and shift fork, be provided with tension spring, described flange is provided with back-up ring, back-up ring gear is in one end of unidirectional needle bearing and one end of Step Shaft, between the boss of described adjusting axle and fixed tray, wear plate is installed.
The lower end of described adjusting axle has flat gesture, and adjusting axle is riveted together by the endoporus of flat gesture and fixed block.
The upper end of described Step Shaft has counterbore, and described back-up ring is the sleeve with flanging, and the flanging part of back-up ring offsets with the upper end of unidirectional needle bearing, and counterbore bottom is stretched in the sleeve part of back-up ring.
Adopt after said structure, the present invention is when between brake slipper and brake disc during excesssive gap, and in braking state, actuating mechanism brake lever is actuated the fixedly contact pin of shift fork, drives shift fork to rotate; Due to the effect of unidirectional needle bearing, shift fork and flange are locked, and flange rotates under the drive of shift fork; At rotation torque, do not have when excessive, flange drives clutch housing to rotate together by ball; The threaded pipe rotation that rotarily drives disk type braker of clutch housing, thus gap eliminated.After braking is cancelled, actuating mechanism brake lever drives shift fork counterrotating, and now unidirectional needle bearing allows to relatively rotate between shift fork and flange, so flange does not rotate, clutch housing does not have counterrotating, and therefore the gap in original excessive gap is eliminated.The present invention adopts unidirectional needle bearing to replace the helical torsional spring of prior art, and therefore, simple in structure, stability and reliability are high.
Accompanying drawing explanation
The present invention is further detailed explanation for the embodiment who provides below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of the gap adjusting mechanism of air-pressure disc brake of the present invention;
Fig. 2 is the perspective view of the shift fork of Fig. 1;
Fig. 3 is the B portion partial enlarged drawing of Fig. 1;
Fig. 4 is the A-A sectional view of Fig. 1.
Embodiment
As shown in Fig. 1 ~ 4, a kind of gap adjusting mechanism of air-pressure disc brake, comprise shift fork 1, flange 3, ball 4, overload clutch 5, adjusting axle 7 and fixed tray 8, described fixed tray 8 and flange 3 are rotatably assorted and are sleeved on adjusting axle 7, described shift fork 1 is enclosed within outside flange 3, described overload clutch 5 is positioned at the bottom of adjusting axle 7, described overload clutch 5 comprises housing 5-1, spring 5-2 and fast pulley 6, one end of spring 5-2 and housing 5-1 inwall offset, the other end and fast pulley 6 offset, fast pulley 6 is fixed on the bottom of adjusting axle 7, the periphery of described housing 5-1 is provided with external splines 5-1-1, described flange 3 has Step Shaft 3-1 and flange plate 3-2, Step Shaft 3-1 is upper, flange plate 3-2 under, the endoporus of described shift fork 1 coordinates with the outer ring of a unidirectional needle bearing 2, the inner ring of unidirectional needle bearing 2 is arranged on the Step Shaft 3-1 of flange 3, the lower end surface of the flange plate 3-2 of described flange 3 has several first pits 3-2-1, the upper-end surface of the housing 5-1 of described overload clutch 5 has several second pit 5-1-1s corresponding with the first pit 3-2-1 of flange 3, described ball 4 is contained in the cavity volume forming between the first pit 3-2-1 and corresponding the second pit 5-1-1, the inwall of the housing 5-1 of described overload clutch 5 has spline 5-3, the periphery of fast pulley 6 has spline tooth 6-1, spline tooth 6-1 coordinates with spline 5-3, between described fixed tray 8 and shift fork 1, be provided with tension spring 10, described flange 3 is provided with back-up ring 11, back-up ring 11 gears are in one end of unidirectional needle bearing 2 and one end of Step Shaft 3-1, between the boss 7-1 of described adjusting axle 7 and fixed tray 8, wear plate 9 is installed.
Described the first pit 3-2-1, the second pit 5-1-1 and ball 4 quantity equate, have a ball 4 in each cavity volume.
As shown in Fig. 1,4, the lower end of described adjusting axle 7 has flat gesture 7-2, and adjusting axle 7 is riveted together by the endoporus 6-2 of flat gesture 7-2 and fixed block 6.
As shown in Figure 1, the upper end of described Step Shaft 3-1 has counterbore 3-1-1, and described back-up ring 11 is the sleeve with flanging, and the flanging part of back-up ring 11 offsets with the upper end of unidirectional needle bearing 2, and counterbore 3-1-1 bottom is stretched in the sleeve part of back-up ring 11.
As shown in Fig. 1 ~ 4, when the present invention uses, at air-pressure disc brake normal brake application state, when the air gap between brake slipper and brake disc surpasses setting air gap value, from the fixedly contact pin 1-1 rotation that rotarily drives shift fork 1 of Disk Brake lever, and then drive shift fork 1 rotation; In braking state, unidirectional needle bearing 2 is in locking state, and the rotation of shift fork 1 drives flange 3 to rotate by unidirectional needle bearing 2.
If transmit from flange 3 rotation torque coming, do not surpass the Maximum Torque that overload protective device sets, flange 3 will drive overload clutch housing 5-1 to be rotated by ball 4; Clutch housing 5-1 inside has some spline 5-3, the outer ring of fixed block 6 has some spline tooth 6-1, coordinate transmitting torque with the spline 5-3 of clutch housing 5, endoporus 6-2 and the adjusting axle 7 of fixed block 6 are riveted together, the rotation of clutch housing 5-1 is delivered on adjusting axle 7 by the endoporus 6-2 of spline 5-3, external splines 5-1-1, fixed block 6, and adjusting axle 7 is synchronously rotated with clutch housing 5-1; Between adjusting axle 7 and fixed tray 8, there is antifriction sheet 9, allow adjusting axle 7 with respect to fixed tray 8 rotations.The outside of clutch housing 5-1 has external splines 5-1-1, and external splines 5-1-1 drives the screw rod of disk type braker to be rotated, and the rotation of screw rod is converted into axial displacement, has eliminated the gap between brake slipper and brake disc.
After the gap between brake slipper and brake disc is eliminated; brake slipper is pressed close to brake disc; rotation torque from shift fork 1 and flange 3 can increase suddenly so; when moment of torsion surpasses the Maximum Torque that overload protective device sets; all balls 4 are moving to adjacent another to pit 3-2-1,5-1-1 from a pair of pit 3-2-1,5-1-1; eliminated the rotation torque from flange 3, clutch housing 5-1 will no longer rotate with flange 3 jointly so.
During release of brake, between brake slipper and brake disc, produce air gap, when air gap just will surpass setting air gap, brake lever drives the fixedly contact pin 1-1 opposite spin of shift fork 1, and then drive shift fork 1 opposite spin, now unidirectional needle bearing 2 is in releasing orientation, and flange 3 can not be followed shift fork 1 counterrotating together, and clutch housing 5-1 can not be rotated yet.Therefore the air gap being eliminated in braking state can't regenerate, thereby has played the effect of compensate for clearance.
Claims (3)
1. the gap adjusting mechanism of an air-pressure disc brake, comprise shift fork (1), flange (3), ball (4), overload clutch (5), adjusting axle (7) and fixed tray (8), described fixed tray (8) and flange (3) are rotatably assorted and are sleeved on adjusting axle (7), described shift fork (1) is enclosed within outside flange (3), described overload clutch (5) is positioned at the bottom of adjusting axle (7), described overload clutch (5) comprises housing (5-1), spring (5-2) and fast pulley (6), one end of spring (5-2) and housing (5-1) inwall offset, the other end and fast pulley (6) offset, fast pulley (6) is fixed on the bottom of adjusting axle (7), the periphery of described housing (5-1) is provided with external splines (5-1-1), it is characterized in that:
A, described flange (3) have Step Shaft (3-1) and flange plate (3-2), and Step Shaft (3-1) is upper, flange plate (3-2) under,
The endoporus of b, described shift fork (1) coordinates with the outer ring of a unidirectional needle bearing (2), and the inner ring of unidirectional needle bearing (2) is arranged on the Step Shaft (3-1) of flange (3),
The lower end surface of the flange plate (3-2) of c, described flange (3) has several the first pits (3-2-1), the upper-end surface of the housing (5-1) of described overload clutch (5) has several second pits (5-1-1) corresponding with first pit (3-2-1) of flange (3), described ball (4) is contained in the cavity volume forming between the first pit (3-2-1) and corresponding the second pit (5-1-1)
The inwall of the housing (5-1) of d, described overload clutch (5) has spline (5-3), and the periphery of fast pulley (6) has spline tooth (6-1), and spline tooth (6-1) coordinates with spline (5-3),
Between e, described fixed tray (8) and shift fork (1), be provided with tension spring (10),
F, described flange (3) are provided with back-up ring (11), and back-up ring (11) keeps off in one end of unidirectional needle bearing (2) and one end of Step Shaft (3-1),
Between the boss (7-1) of g, described adjusting axle (7) and fixed tray (8), wear plate (9) is installed.
2. the gap adjusting mechanism of air-pressure disc brake according to claim 1, it is characterized in that: the lower end of described adjusting axle (7) has flat gesture (7-2), adjusting axle (7) is riveted together by flat gesture (7-2) and the endoporus (6-2) of fixed block (6).
3. the gap adjusting mechanism of air-pressure disc brake according to claim 1, it is characterized in that: the upper end of described Step Shaft (3-1) has counterbore (3-1-1), described back-up ring (11) is the sleeve with flanging, the flanging part of back-up ring (11) offsets with the upper end of unidirectional needle bearing (2), and counterbore (3-1-1) bottom is stretched in the sleeve part of back-up ring (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310686191.7A CN103629279B (en) | 2013-12-16 | 2013-12-16 | Gap adjusting mechanism for air pressure disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310686191.7A CN103629279B (en) | 2013-12-16 | 2013-12-16 | Gap adjusting mechanism for air pressure disc brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103629279A true CN103629279A (en) | 2014-03-12 |
| CN103629279B CN103629279B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310686191.7A Active CN103629279B (en) | 2013-12-16 | 2013-12-16 | Gap adjusting mechanism for air pressure disc brake |
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| Country | Link |
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| CN (1) | CN103629279B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455119A (en) * | 2014-12-17 | 2015-03-25 | 南车戚墅堰机车车辆工艺研究所有限公司 | Brake clearance adjuster |
| CN104500623A (en) * | 2014-12-17 | 2015-04-08 | 南车戚墅堰机车车辆工艺研究所有限公司 | Clearance adjuster of pneumatic disc brake |
| US10738836B2 (en) | 2016-11-30 | 2020-08-11 | Saint-Gobain Performance Plastics Rencol Limited | Adjustable torque assembly |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043279U (en) * | 1988-07-20 | 1989-08-23 | 上海电机厂 | Thick sealant injecting device |
| CN2781078Y (en) * | 2005-04-19 | 2006-05-17 | 万安集团有限公司 | Overload protection mechanism of pressure disk brake |
| US20110155518A1 (en) * | 2008-08-01 | 2011-06-30 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Disc Brake Adjusting Device with a Torque Dependent Coupling |
| CN102269231A (en) * | 2011-06-09 | 2011-12-07 | 段昌金 | Automatic regulator |
| US20120193176A1 (en) * | 2011-01-31 | 2012-08-02 | Knowles Richard N | Brake System Comprising A Retractor |
| CN202768690U (en) * | 2012-09-03 | 2013-03-06 | 枣庄泰德机械有限公司 | Air pressure disk type brake adjuster |
| CN203655982U (en) * | 2013-12-16 | 2014-06-18 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gap adjusting mechanism of air pressure disk brake |
-
2013
- 2013-12-16 CN CN201310686191.7A patent/CN103629279B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043279U (en) * | 1988-07-20 | 1989-08-23 | 上海电机厂 | Thick sealant injecting device |
| CN2781078Y (en) * | 2005-04-19 | 2006-05-17 | 万安集团有限公司 | Overload protection mechanism of pressure disk brake |
| US20110155518A1 (en) * | 2008-08-01 | 2011-06-30 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Disc Brake Adjusting Device with a Torque Dependent Coupling |
| US20120193176A1 (en) * | 2011-01-31 | 2012-08-02 | Knowles Richard N | Brake System Comprising A Retractor |
| CN102269231A (en) * | 2011-06-09 | 2011-12-07 | 段昌金 | Automatic regulator |
| CN202768690U (en) * | 2012-09-03 | 2013-03-06 | 枣庄泰德机械有限公司 | Air pressure disk type brake adjuster |
| CN203655982U (en) * | 2013-12-16 | 2014-06-18 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gap adjusting mechanism of air pressure disk brake |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455119A (en) * | 2014-12-17 | 2015-03-25 | 南车戚墅堰机车车辆工艺研究所有限公司 | Brake clearance adjuster |
| CN104500623A (en) * | 2014-12-17 | 2015-04-08 | 南车戚墅堰机车车辆工艺研究所有限公司 | Clearance adjuster of pneumatic disc brake |
| CN104500623B (en) * | 2014-12-17 | 2017-02-22 | 南车戚墅堰机车车辆工艺研究所有限公司 | Clearance adjuster of pneumatic disc brake |
| US10738836B2 (en) | 2016-11-30 | 2020-08-11 | Saint-Gobain Performance Plastics Rencol Limited | Adjustable torque assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103629279B (en) | 2017-02-15 |
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Address after: 213011 Wuyi Road, Changzhou, Jiangsu, No. 258, No. Applicant after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213011 Wuyi Road, Qishuyan District, Jiangsu, China, No. 258, No. Applicant before: CSR QISHUYAN INSTITUTE Co.,Ltd. |
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Address after: 213011 No. 51 Wuyi Road, Qishuyan, Changzhou, Jiangsu, 258 Patentee after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Country or region after: China Address before: 213011 No. 51 Wuyi Road, Qishuyan, Changzhou, Jiangsu, 258 Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. Country or region before: China |